feat(module:menu): add support nzPlacement for nz-submenu

[klerick]

Closes #4743

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: #4743

What is the new behavior?

Add new option for set position sub-menu

Does this PR introduce a breaking change?

[ ] Yes
[x ] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #7420 (c8884ee) into master (ff8599b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head c8884ee differs from pull request most recent head c1d9179. Consider uploading reports for the commit c1d9179 to get more accurate results

@@           Coverage Diff           @@
##           master    #7420   +/-   ##
=======================================
  Coverage   91.64%   91.64%           
=======================================
  Files         487      487           
  Lines       16043    16045    +2     
  Branches     2610     2611    +1     
=======================================
+ Hits        14702    14704    +2     
  Misses       1028     1028           
  Partials      313      313           

Impacted Files	Coverage Δ
components/core/overlay/overlay-position.ts	90.90% <ø> (ø)
components/menu/submenu.component.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ff8599b...c1d9179. Read the comment docs.

[simplejason]

I don't think we need to expose the concept of placement to users, the better way is that we should fix the menu being obscured with cdkConnectedOverlayPositions.

[klerick]

I don't think we need to expose the concept of placement to users, the better way is that we should fix the menu being obscured with cdkConnectedOverlayPositions.

#4743
allready opened halve year but does not have progress.

I dont find solution it fix use cdkConnectedOverlayPositions.
i try to recalculate position on run time, but it looks like hack

[simplejason]

LGTM